#include "graph_displayer_canvas.h"

#include <cmath>

GraphDisplayerCanvas::GraphDisplayerCanvas(NoteBookTab & mainw) :

  nodesmap(mainw.mapstorage.graph), edgesmap(mainw.mapstorage.graph), edgetextmap(mainw.mapstorage.graph),

  nodetextmap(mainw.mapstorage.graph), displayed_graph(*(root()), 0, 0),

  isbutton(0), active_item(NULL), target_item(NULL), nodemap_to_edit(""),

  edgemap_to_edit(""), mytab(mainw)

{

  //base event handler is move tool

  actual_handler=signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::moveEventHandler), false);

  actual_tool=MOVE;

  active_node=INVALID;

  active_edge=INVALID;

  forming_edge=INVALID;

}

GraphDisplayerCanvas::~GraphDisplayerCanvas()

{

  for (NodeIt n((mytab.mapstorage).graph); n != INVALID; ++n)

    {

      delete nodesmap[n];

      delete nodetextmap[n];

    }

  for (EdgeIt e((mytab.mapstorage).graph); e != INVALID; ++e)

    {

      delete edgesmap[e];

      delete edgetextmap[e];

    }

}

void GraphDisplayerCanvas::propertyChange(bool itisedge, int prop)

{

  if(itisedge)

    {

      propertyUpdate(Edge(INVALID), prop);

    }

  else

    {

      propertyUpdate(Node(INVALID), prop);

    }

}

void GraphDisplayerCanvas::propertyUpdate(Edge edge)

{

  for(int i=0;i<EDGE_PROPERTY_NUM;i++)

    {

      propertyUpdate(edge, i);

    }

}

void GraphDisplayerCanvas::propertyUpdate(Node node)

{

  for(int i=0;i<NODE_PROPERTY_NUM;i++)

    {

      propertyUpdate(node, i);

    }

}

void GraphDisplayerCanvas::propertyUpdate(Node node, int prop, int dummy)

{

  dummy=dummy;

  std::string mapname=mytab.getActiveNodeMap(prop);

  if(mapname!="")

    {

      if( ( ((mytab.mapstorage).nodemap_storage).find(mapname) != ((mytab.mapstorage).nodemap_storage).end() ) )

	{

	  switch(prop)

	    {

	    case N_RADIUS:

	      changeNodeRadius(mapname, node);

	      break;

	    case N_COLOR:

	      changeNodeColor(mapname, node);

	      break;

	    case N_TEXT:

	      changeNodeText(mapname, node);

	      break;

	    default:

	      std::cerr<<"Error\n";

	    }

	}

    }

  else //mapname==""

    {

      Node node=INVALID;	

      switch(prop)

	{

	case N_RADIUS:

	  resetNodeRadius(node);

	  break;

	case N_COLOR:

	  resetNodeColor(node);

	  break;

	case N_TEXT:

	  resetNodeText(node);

	  break;

	default:

	  std::cerr<<"Error\n";

	}

    }

}

void GraphDisplayerCanvas::propertyUpdate(Edge edge, int prop, int dummy)

{

  dummy=dummy;

  std::string mapname=mytab.getActiveEdgeMap(prop);

  if(mapname!="")

    {

      if( ( ((mytab.mapstorage).edgemap_storage).find(mapname) != ((mytab.mapstorage).edgemap_storage).end() ) )

	{

	  switch(prop)

	    {

	    case E_WIDTH:

	      changeEdgeWidth(mapname, edge);

	      break;

	    case E_COLOR:

	      changeEdgeColor(mapname, edge);

	      break;

	    case E_TEXT:

	      changeEdgeText(mapname, edge);

	      break;

	    default:

	      std::cerr<<"Error\n";

	    }

	}

    }

  else //mapname==""

    {

      switch(prop)

	{

	case E_WIDTH:

	  resetEdgeWidth(edge);

	  break;

	case E_COLOR:

	  resetEdgeColor(edge);

	  break;

	case E_TEXT:

	  resetEdgeText(edge);

	  break;

	default:

	  std::cerr<<"Error\n";

	}

    }

}

void GraphDisplayerCanvas::drawGraph()

{

  //first edges are drawn, to hide joining with nodes later

  for (EdgeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)

  {

    //drawing green lines, coordinates are from mapstorage.coords

    Gnome::Canvas::Points coos;

    coos.push_back(Gnome::Art::Point(

          (mytab.mapstorage).coords[(mytab.mapstorage).graph.source(i)].x,

          (mytab.mapstorage).coords[(mytab.mapstorage).graph.source(i)].y));

    coos.push_back(Gnome::Art::Point(

          (mytab.mapstorage).coords[(mytab.mapstorage).graph.target(i)].x,

          (mytab.mapstorage).coords[(mytab.mapstorage).graph.target(i)].y));

    edgesmap[i]=new BrokenEdge(displayed_graph, i, *this);

    *(edgesmap[i]) << Gnome::Canvas::Properties::fill_color("green");

    edgesmap[i]->property_width_units().set_value(10);    

    edgesmap[i]->lower_to_bottom();

    //initializing edge-text as well, to empty string

    XY text_pos=mytab.mapstorage.arrow_pos[i];

    text_pos+=(XY(10,10));

    edgetextmap[i]=new Gnome::Canvas::Text(displayed_graph, text_pos.x, text_pos.y, "");

    edgetextmap[i]->property_fill_color().set_value("darkgreen");

    edgetextmap[i]->signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::edgeMapEditEventHandler), false);

    edgetextmap[i]->raise_to_top();

  }

  //afterwards nodes come to be drawn

  for (NodeIt i((mytab.mapstorage).graph); i!=INVALID; ++i)

  {

    //drawing bule nodes, with black line around them

    nodesmap[i]=new Gnome::Canvas::Ellipse(

        displayed_graph,

        (mytab.mapstorage).coords[i].x-20,

        (mytab.mapstorage).coords[i].y-20,

        (mytab.mapstorage).coords[i].x+20,

        (mytab.mapstorage).coords[i].y+20);

    *(nodesmap[i]) << Gnome::Canvas::Properties::fill_color("blue");

    *(nodesmap[i]) << Gnome::Canvas::Properties::outline_color("black");

    nodesmap[i]->raise_to_top();

    //initializing edge-text as well, to empty string

    xy<double> text_pos(

        ((mytab.mapstorage).coords[i].x+node_property_defaults[N_RADIUS]+5),

        ((mytab.mapstorage).coords[i].y+node_property_defaults[N_RADIUS]+5));

    nodetextmap[i]=new Gnome::Canvas::Text(displayed_graph,

        text_pos.x, text_pos.y, "");

    nodetextmap[i]->property_fill_color().set_value("darkblue");

    nodetextmap[i]->signal_event().connect(sigc::mem_fun(*this, &GraphDisplayerCanvas::nodeMapEditEventHandler), false);

    nodetextmap[i]->raise_to_top();

  }

  updateScrollRegion();

}

void GraphDisplayerCanvas::clear()

{

  active_node=INVALID;

  active_edge=INVALID;

  forming_edge=INVALID;

  for (NodeIt n((mytab.mapstorage).graph); n != INVALID; ++n)

  {

    delete nodesmap[n];

    delete nodetextmap[n];

  }

  for (EdgeIt e((mytab.mapstorage).graph); e != INVALID; ++e)

  {

    delete edgesmap[e];

    delete edgetextmap[e];

  }

}